How to write code for double summation

How to write matlab code for this double summation DCT equation since I want to solve DCT for an image without using dct function.

Answer 1

[Veera Kanmani]

for double summation, use nested for loop. https://in.mathworks.com/matlabcentral/answers/353879-how-to-solve-the-double-summation-of-the-given-expression for further reference refer the link